Lesson 5

In Try This 4, you may have noticed that three-dimensional transformations are very similar to two-dimensional transformations, but they are sometimes a bit harder to see.

• The fish represented a dilation, because the fish were the same except one was larger than the other.
• The girls represented a reflection. You can imagine this picture being made using the girl on the left and a mirror that is to the right and slightly behind her.
• The plane has been rotated. If the pattern continued, the plane would fly in a circle.
• Finally, the blimp is a translation. It is the same object in a different position. Although the blimp looks bigger, it is because it is closer and viewed from a different angle. The blimp did not change size while travelling.

Self-Check 3